Ventilator.



No. 844,735. I PATENTED FEB. 19; 1907.

L. A. MOGALLA. VENTILATOR.

APPLICATION FILED JULY3, 1905.

UNIT D STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Feb. 19, 1907.

Application filed July 3,1905. Serial No. 268,130.

To aZZ whom it may concern:

Be it known that I, LEE MCCALLA, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new' and useful Improvements in Ventilators, of which the following is a full, clear, concise, and exact description,

reference being had to the accompanying heretofore been constructed what is known as a diffusion-box is provided, which communicates with the outer atmosphere and which also has openings communicating with the room. The air is generally admitted to the diffusion-box through vertical openings and traverses variously-arranged passages into the box and thence passes through an opening in the top of the diffusion-box out into the room. By this construction, while the draft to an extent is prevented, I have found that when the ventilators are opened to their fullest extent they do not prevent a draft in the room and if partially closed do not admit suflicient fresh air to the room to properly ventilate the same.

By my improved construction the air is adapted to enter from the exterior of the room through a. horizontally-arranged assage and pass into the diffusion-box, w ere the current of air is deflected by a draftbreaker extending into the diffusion-box and thence passes upwardly out of the diffusion-box into the room. By this construction I- am enabled to et the maximum amount of fresh air into the room without in any manner causing a draft therein.

.I have illustrated one form of my invention in the accompanying drawings, in which I Figure 1 is a front elevation of a window,

showing my improved ventilator applied.

Fig. 2 is a front elevation of my ventilator. Fig. 3 is a plan view of the same; and Fig. 4 is a sectional view of the same, taken on the line 4 4 of Fig. 2.

In the preferred embodiment of my invention I provide a suitable panel 1, which is adapted to be fitted within the windowframe, preferably beneath the raised window,

| as shown in Fig. 1, and upon the outer side of this panel a hood 2 is attached. 'lhis hood is adapted to extend the length of an opening 3 formed in the panel, and the lower end of the hood is adapted to lie in a plane I substantially adjacent the bottom of the opening. '10 the under side of the panel a deflector 4 is provided, which extends into I the hood and is curved outwardly, as shown, having its upper end lying in a plane slightly above the lower end of the hood 2.

If desired, a screen to prevent "dust from entering the hood may be placed across the lower opening thereof in any suitable manner. This screen may extend entirely across the lower opening of the hood or it may exthe lower end of the hood.

Upon the inner side of the window a difi'usion-box 5 is connected opposite the opening 3 and communicating therewith, which preferably has the upturned side 6 thereof extending up to a point slightly above the top of the opening 3. The space between the side wall 6 and the panel may be closed by a lid or draft-breaker7, which is in the form of a curved plate pivoted at 8 to the panel 1 and having downwardlyextending side flanges 9 at either end thereof. These flanges when the lid is lowered engage against the sides of the panel and prevent the draft-breaker from being dropped too far. They also, due to their frictional engagement with the sides of the difi'usion-box, serve to hold the draftbreaker in any position to which it may be moved. Upon the-inner side of the difl'usion-box I preferably provide a small springcatch 10, which is adapted to engage the outer edge of the draft-breaker and hold the close the ventilator. While I have shown this as one means of maintaining the draftbreaker in a raised position, any other desired means may be usedas, for instance, forming an inwardlyextending bead along the upper edge of the diffusion-box, which will engage the edge of the draft-breaker and maintain the same in a raised position.

. In operation the ventilator is placed in the window' in the position shown in Fig. 1, with the hood 2 extending into the open air and the diffusion-box 5 extending into the room. The draft-breaker is lowered to any desired extent, being shown in the drawings as lowered to its furthest position. will enter beneath the hood and be deflected tend from the upper end of the deflector 4 to same in a raised position when it is desired to The air lIO upwardly by the deflector 4. It will then take a course across the hood through the opening in the panel and striking against the curved draft-breaker 7 will be deflected downwardly, whence it will pass beneath the draft-breaker and up into the room, having been difl'used before'passing into theroom and passing into the room without creating a noticeable draft. It will be noted that by my'construction there is no ossible direct path for the air to enter into t e room; but it must take a circuitous path through the hood and deflector before it enters the room, and 7 closure for the opening of the difiTusion-box the draft will always be broken no matter to what position the draft-breaker may be moved. By this construction I am enabled to entirely eliminate from the device the use ofautomatic valves or the use of valves which are delicately balanced and liable to getout of order or become rusty and clogged with dust and dirt, and I am enabled to provide a device which gives maximum ventilation' with a minimum draft in the room.

While I have described my device as being used in connection with a panel adapted to be fitted within the window, it will be under stood that the same may be attached directly to the window-frame, an opening being cut therein, instead of in a separate panel, or the same may-:be' used in any other position' desired without departing from thespirit of myinvention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a ventilator, the combination with a hood, having an opening in the bottom thereof, of means for deflecting the air toward the upper part of said hood, a diffusion-box communicating with said hood, and an adjustable. draft-breakeradapted to deflect the airtoward the bottom of said diffusion-box.-

2. In a ventilator, the combination with a hood, having an opening 1n the bottom thereof, of a deflector, extending into said hood, andadapted to deflect the air towardthe top thereof, of a difi'usion-bo x communi- I eating with said hood, andan adjustable draft-breaker extending into said difi'usion.

hood having an opening in the bottom thereof, of means for deflecting the air toward the upper part of said hood, a diffusion-box communicating with said hood, and adraftbreaker arranged in the path of the entering air to deflect the air toward the bottom of said diffusion-box. w

4. In a Ventilator, the combination with a hood, having an opening in the bottom thereof, of a deflector extending into said hood and arranged to deflect the air toward the top thereof, of a diffusion-box communi eating with said hood, and a draft-breaker extending into said diffusion-box in the path of the air to deflect the air toward the bottom thereof.

5. Ina ventilator, the combination with a hood open at thebottom, of a diffusion-box communicating with said hood and open at the top, a draftbrea ker arranged in said diffusion-box and extending downwardly therein into the path of the admitted current of air.

6. A ventilatorhaving a hoodprovided:

with an opening to the atmosphere and a diffusion-box provided with an opening to the room, a deflector arranged in said hood,

and a draft-breaker arranged in said diffu 4 sion-box in the path of the air to'cause the air to take the path of a reverse curve in passing through said ventilator;

diffusion-box having the side thereof, opposite the opening through which the air enters V the same, in a plane substantially parallel with the window, of a draftb reaker extend ing into said box, in; the path of the enter- W. PERRY HALEY, ROBERT LEWIS AMEs.

. 9o 7. In a ventilator, the comblnation with a Y 

